FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 14

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

PIN NO.
TQFP
QFP/
94
23
58
98
Drive 2
Interrupt
Request B
I/O Power
Address X
NAME
DESCRIPTION OF PIN FUNCTIONS
DRV2
nADRX
IRQ_B
IRQIN
PWRGD
nGAMECS
NC
SYMBOL
BUFFER
(OD24)
OD24
TYPE
024
O4
I
I
I
14
In PS/2 mode, this input indicates whether a
second drive is connected; DRV2 should be
low if a second drive is connected.
status is reflected in a read of Status
Register A.
Active low address decode out: used to
decode a 1, 8, or 16 byte address block. (An
external pull-up is required). Refer to
Configuration registers CR03, CR08 and
CR09 for more information. This pin has a
30ua internal pull-up. The interrupt request
from a logical device or IRQIN may be
output on IRQ_B. Refer to the configuration
registers for more information.
(If EPP or ECP Mode is enabled, this output
is pulsed low, then released to allow sharing
of interrupts.)
This pin is used to steer an interrupt signal
from an external device onto one of eight
IRQ outputs IRQA-H.
This active high input indicates that the
power (V
PWRGD must be active. When PWRGD is
inactive,
disconnected and put into a low power
mode;
impedance. The contents of all registers are
preserved as long as V
to ISTBY - standby current. This input has
an internal 30ua pull-up.
This is the Game Port Chip Select output -
active low. It will go active when the I/O
address, qualified by AEN, matches that
selected in Configuration register CR1E.
No Connect
The driver current drain in this mode drops
all
CC
all
) is valid. For device operation,
outputs
DESCRIPTION
inputs
are
CC
to
has a valid value.
put
Mercury
into
This
high
are